Tubular lamp



FIG. 1 is a front view of a tubular lamp showing our new design, the portion of the device depicted in broken lines being environment and forming no part of the claimed design;

FIG. 2 is a perspective front view of the right end thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 3 is a top view thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 4 is a bottom view thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 5 is a front view thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design;

FIG. 6 is an end view thereof; and,

FIG. 7 is a rear view thereof, the portion of the device depicted in broken lines being environment and no part of the claimed design. 

The ornamental design for a tubular lamp, as shown and described. 